Bump Microsoft.AspNetCore.Authentication.OpenIdConnect

Bumps [Microsoft.AspNetCore.Authentication.OpenIdConnect](https://github.com/dotnet/aspnetcore) from 6.0.29 to 8.0.12.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@v6.0.29...v8.0.12)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.Authentication.OpenIdConnect
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

DigitalLearningSolutions.Web/DigitalLearningSolutions.Web.csproj

@@ -69,7 +69,7 @@
         <PackageReference Include="GDS.MultiPageFormData" Version="1.0.6" />
         <PackageReference Include="HtmlAgilityPack" Version="1.11.54" />
         <PackageReference Include="HtmlSanitizer" Version="8.0.795" />
-        <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="6.0.29" />
+        <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="8.0.12" />
         <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="6.0.24" />
         <PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
         <PackageReference Include="Microsoft.FeatureManagement" Version="3.1.0" />